Dual fiber bragg grating strain sensor system
First Claim
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1. A dual fiber Bragg grating strain sensor system, which comprises:
- a broadband light source;
a power reading unit; and
a sensor unit having a first fiber Bragg grating and a second fiber Bragg grating placed adjacent to each other wherein the broadband light reaches said sensor unit through said power reading unit, and said first fiber Bragg grating and said second fiber Bragg grating generate the light that corresponds to the intersection between the spectra of the two FBGs to said power reading unit.
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Abstract
The present invention provides a dual fiber Bragg grating strain sensor system, which comprises a broadband light source, a power reading unit, and a sensor unit having a first fiber Bragg grating and a second fiber Bragg grating placed adjacent to each other; wherein the broadband light reaches said sensor unit through said power reading unit, the light that corresponds to the intersection between the spectra of the two FBGs is backreflected and is detected by an optical power meter/detector at the detection port.
15 Citations
27 Claims
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1. A dual fiber Bragg grating strain sensor system, which comprises:
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a broadband light source;
a power reading unit; and
a sensor unit having a first fiber Bragg grating and a second fiber Bragg grating placed adjacent to each other wherein the broadband light reaches said sensor unit through said power reading unit, and said first fiber Bragg grating and said second fiber Bragg grating generate the light that corresponds to the intersection between the spectra of the two FBGs to said power reading unit. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A dual fiber Bragg grating strain sensor system, which comprises:
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a broadband light source;
a calibration system;
a power reading unit; and
a sensor unit having a first fiber Bragg grating and a second fiber Bragg grating placed adjacent to each other;
wherein the broadband light reaches said sensor unit through said calibration system and said power reading unit, and said first fiber Bragg grating and said second fiber Bragg grating generate the light that corresponds to the intersection between the spectra of the two FBGs to said power reading unit. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A dual fiber Bragg grating strain sensor system, which comprises:
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a broadband light source;
a power splitter;
a plurality of power reading units; and
a plurality of sensor units having a first fiber Bragg grating and a second fiber Bragg grating placed adjacent to each other;
wherein the broadband light reaches each said power reading unit through said power splitter and reaches each sensor unit through each said power reading unit, and each said first fiber Bragg grating and each said second fiber Bragg grating generate the light that corresponds to the intersection between the spectra of the two FBGs to each said power reading unit. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A dual fiber Bragg grating strain sensor system, which comprises:
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a broadband light source;
a power splitter;
a plurality of calibration systems;
a plurality of power reading units; and
a plurality of sensor units having a first fiber Bragg grating and a second fiber Bragg grating placed adjacent to each other;
wherein the broadband light split by said power splitter reaches each said sensor unit through each said calibration system and each said power reading unit, and said first fiber Bragg grating and said second fiber Bragg grating of each sensor unit generate the light that corresponds to the intersection between the spectra of the two FBGs to each said power reading unit. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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Specification